Variable: image-convert-to-format
image-convert-to-format is a customizable variable defined in
image-converter.el.gz.
Value
"png"
Documentation
The image format to convert to.
This should be a string like "png" or "ppm", or some other (preferably lossless) format that Emacs understands natively. The converter chosen has to support this format; if not, the conversion will fail.
This variable was added, or its default value changed, in Emacs 29.1.
Source Code
;; Defined in /usr/src/emacs/lisp/image/image-converter.el.gz
(defcustom image-convert-to-format "png"
"The image format to convert to.
This should be a string like \"png\" or \"ppm\", or some
other (preferably lossless) format that Emacs understands
natively. The converter chosen has to support this format; if
not, the conversion will fail."
:group 'image
:version "29.1"
:type 'string)